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The Automotive Research Association of India [5] (ARAI) is located in the western part of Pune, Maharashtra. [6] The 105 hectares (260 acres) of land houses various laboratories, test facilities spread over 8343 m 2 of area. It is well connected by air, rail and road about 25 km from Pune Airport and 12 km from the railway station.
Perhaps the simplest optical waveguide is the dielectric slab waveguide, [2] also called a planar waveguide. [3] Owing to their simplicity, slab waveguides are often used as toy models but also find application in on-chip devices like arrayed waveguide gratings and acousto-optic filters and modulators .
Another defense is photochromic materials able to become opaque under high light energy densities. Nonlinear optics techniques are being investigated: e.g. vanadium-doped zinc telluride (V:ZnTe) can be used to form electro-optic power limiters able to selectively block the intense dazzler beam without affecting weaker light from an observed scene.
Photochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species (photoswitch) between two forms by the absorption of electromagnetic radiation (photoisomerization), where the two forms have different absorption spectra. [1] [2]
However, photochromic compounds are the necessary building blocks for light driven molecular motors and machines. [2] Upon irradiation with light, photoisomerization about double bonds in the molecule can lead to changes in the cis- or trans- configuration. [3] These photochromic molecules are being considered for a range of applications.
Hirotake Arai's son Michio had spent time in the United States, [2] recognizing a potential market for their helmets (which was dominated by Bell at the time). Arai was approached by New Jersey–based motorsport accessory retailer Roger Weston, [3] [4] [5] who later managed the Arai Helmet Americas division, [6] with a goal to recruit an American racer from the Daytona 200 to wear an Arai helmet.
A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.
Aria was formed in Japan in 1956 by Shiro Arai as "Arai & Co., Inc". [1] [2] They began retailing acoustic guitars in 1960, although the company did not start manufacturing their own until 1964. Aria arranged for Matsumoku, the musical instrument maker, to build the guitars for them under contract. Aria and Matsumoku started building acoustic ...
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